Failed to open stream: Permission denied theme.inc on line 155

Maybe you're having the same problem that I just did:

warning: include_once(./) [function.include-once]: failed to open stream: Permission denied in ...\theme.inc on line 155. warning: include_once() [function.include]: Failed opening './' for inclusion (include_path='...') in ...\theme.inc on line 155.

If so, check your theme's .info file - you may have misspelled the theme engine. It needs to be as follows:

engine = phptemplate

Make sure it's all in lowercase.